Continuous high temperature triggered emergency self -protection Nanjing sidewalk tree 2 months in advance fallen leaves in advance

The intersection news "One leaf knows the autumn. After the autumn, there are more fallen leaves on the tree." Mr. Yin, a citizen of Nanjing in the circle of friends. Many citizens have also found that the road trees on the road, the trees in the community, and even the sycamore leaves on the road of Zijin Mountain's cemetery have fallen leaves, two months earlier than previous years. Experts said that this is not a natural autumn leaves, but an emergency response to the self -protection of plants under continuous high temperature. As long as the maintenance is timely, these trees will sprout next spring.

There is a sycamore avenue in the Neng Renli community in Yuhuatai District, Nanjing. Two rows of towering sycamores are used to cover the rain on the road. The resident Ms. Gao recently discovered that there were a lot of leaves that were dried yellow in a large area of ​​sycamore leaves, and there were a lot of leaves that accumulated in the ground for a long time. For this reason, she is very puzzled. In previous years, it was the leaves that had only fallen in late autumn. Why is it yellow now? Are you afraid that it will not continue to bake the sycamore leaves at high temperature?

In addition, the sycamore leaves on the road of Zijin Mountain have fallen. According to Mr. Zhang, who passed by here every day, the sanitation workers will be cleaned up in the morning and evening.

Falling leaves of Lingyuan Road

In addition, the reporter saw on Lushan Road, Hexi, that the yellow leaves of the camphor tree have fallen in advance in the wind. According to Changshu News, the 300 -year -old ginkgo tree was also dry.

"This fallen leaves in August are the emergency of trees self -protection." Zhu Kai, a senior engineer of the Nanjing Garden and Forestry Science Research Institute, introduced that the deciduous trees in Nanjing are mostly from October to November. Will change leaves in spring and summer. When trees encounter changes in small growth environment, such as continuous high temperature, rainfall, or sudden low temperature, emergency reactions will be made, entering the short -term dormant period, the main manifestation is fallen leaves, and it is to reduce flowering or no results. However, citizens do n’t have to worry too much. Generally, after large trees enter the short dormancy, they will gradually recover after the environment is improved. Some deciduous trees will germinate in spring next year, and generally do not die.

The reporter learned that this year's northern hemisphere continues to be high temperature, and tree leaves have become a global phenomenon in advance. According to the Italian Tiantian News Agency, after the peak period of the European heat wave this year, at the end of July, a small number of trees in the 350,000 trees in the city of Turin, Italy began to "wither" as in autumn. moon.

Since the sidewalk tree "gets" the leaves because of the high temperature and drought, the best way is to water. The Nanjing Greening Garden Bureau said that since the summer, the frequency of watering in the garden department has changed from three or four days in the spring and autumn seasons to pouring once a day. And adjusted the operation time of greening, the watering was mainly concentrated at 5 am to 7 am, 7:00 pm to the early morning of the next day. Some trees that are damaged and accumulated in the root system should also be hung with nutrient solution in time to supplement nutrition and moisture.

The garden department reminds everyone that the watering of outdoor plants should pay attention to time. After 9 am to 6 pm, after the sun exposure, the soil temperature rises. At this time, watering is equivalent to "heating" water with hot soil. Cause great harm.

Xinhua Daily · Jiaojiao Reporter Liu Haiqin/Wen Gaoliping Mu Huaijia/Video

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